This bearing is developed to be used in the
decelerator of excavator driving motor, and characterized by its capacity of
high load(radial and axial) and moment, low rotating speed(less than 60rpm),
and oil lubrication.
It is usually arranged in pair to sustain the axial load in both direction.
So called 'Isolated-retainer' is used for ease of making and assembling. This
type of retainer has lower noise than the steel retainer during operation.